I don't need a study to tell me the brains of boxers, MMA fighters, and NFL middle linebackers have endured more trauma than that of a pharmacist at Wal-Mart. Ever heard Joe Frazier talk? You think Muhammed Ali has been affected?
In fact, I read more and more that it's not concussions that are the problem. It's the constant head-banging on basic plays that leads to the issues. It's the jabs that pile up, not the round-house shots that drop you to the floor.
Steve Young had a ton of concussions just like Troy. Young has a law degree and is as salient as they come. Roger Staubach had concussions, then built a billion-dollar real estate business.
I'm not sure anyone has ever suggested that football-related brain injuries universally result in CTE. Smoking doesn't universally cause cancer. Drinking doesn't universally result in liver failure. Care to take a crack at disconnecting those two outcomes from those two behaviors just because a couple of random people didn't develop said outcomes. The fact that a specific action doesn't guarantee a specific outcome in every instance doesn't mean that we shouldn't study the relationship in order to better understand how we can minimize the risk.
The question is, why are some people more susceptible to issues later on than others? Is the depression after a career the result of brain issues, or is it because of the loss of spotlight, adjustment to a normal life, cessation of PEDs, or an underlying cause that was present all along? No consideration is being given to the possibility that this is environmental more than it is because of these CTE indicators.
That's because some of these environmental factors are not unique to the NFL and therefore there's no rational basis to form a hypothesis around them.
- Underlying condition: Why would anyone think that football players are disproportionately effected by an underlying condition (one that is unrelated to the sport) to an extent that is any greater than what we would observe in the general population?
- Loss of spotlight: Yeah, that might be worth a little thought provided that athletes from other sports or even run of the mill fallen celebrities were developing the symptoms associated with CTE at a similar rate as NFL players are.
- Cessation of PEDs: Again, plenty of examples to compare to. Other professional sports or even olympians. Is there any population that takes more PEDs than bodybuilders, both in quantity and variety?
You have to have some basis on which to form your hypothesis. Throwing out random ideas without any sort of foundation isn't a great way to start a scientific investigation. Neither is just accepting that something is true regardless of how blatantly obvious observations may be. This doesn't even being to acknowledge that you can't even study things like an unknown mystery diagnosis because you can't even form a respectable hypothesis in the first place.
These studies are being conducted with a narrative conclusion seemingly already in hand.
That "narrative" is called a hypothesis and it's based on the observational data that is presently available. Likely based on the very same data (Joe Frazier and Ali) that you say makes a study unnecessary. Thankfully the scientific community only uses this data as a starting point, whereas you seem to view it as a foregone conclusion.
The scientific method doesn't require to prove a finding, it says to disprove a finding. That isn't being done here.
This is philosophical statement about the nature of scientific method, not a descriptor of how the scientific method is carried out. What is being done here is exactly what you would expect according to the scientific method. More or less, develop a hypothesis and then test it.
The scientific method doesn't require something to be proven because it can't prove anything. The presence of positive findings does not prove a hypothesis because there could be additional factors that the hypothesis didn't include. It's a general acknowledgement that we don't have a 100% understanding of anything and therefore something can never be proven.
Conversely, it doesn't say to disprove anything. While a hypothesis must have a set of circumstances in which it is untrue, there is no requirement that the scientific method only be used in the name of refutation. The absence of positive findings MUST mean there are alternative explanation and consequently the hypothesis is incorrect. The scientific method can never prove a hypothesis but it can disprove a hypothesis.